Thiev: They didn't disabled the accounts, they changed passwords. You don't have to create a new one.
That's not what the email I got said:
We recently learned that hackers gained unauthorized access to the
decade-old BioWare server system supporting the Neverwinter Nights
forums. We immediately took appropriate steps to protect our
consumers' data and launched a thorough ongoing evaluation of the
breach. We have determined that no credit card data was compromised
from the servers, nor did we ever have or store sensitive data like
social security numbers. Our investigation shows that information
such as user names, encrypted passwords, email addresses, mailing
addresses, names, phone numbers, CD keys and birth dates from
accounts on the system may have been compromised, as well as other
information (if any) that you may have associated with this forum
account. In an abundance of caution, we have disabled your legacy
Account. To create a new account please visit social.bioware.com.
Probably all accounts had their passwords reset, but ones they strongly suspected of being hacked like mine were disabled outright.